Paint spraying apparatus



W. C. BEACH PAINT SPRAYING- APPARATUS July 7, 1931.

2 Sheets-Sheet l ATTORNEY Filed July 5. 1929 y 7, 1931- i w. c. BEACH1,812,854

PAINT SPRAYING APPARATUS Filed July 5, 1929 2 Sheets-Sheet 2 ATTORNEYPatented July 7, 1931 PATENT OFFICE WILLARD o. BEACH, or EAST ORANGE,NEW JERSEY IAINT' SPRAYING APPARATUS Application filed July 3, 1929.Seria1 No. 375,808.

This invention relates to paint spraying devices and has for an objectthe provision of an apparatus by which paint may be automaticallysprayedevenly and rapidly upon a moving surface.

I A further object is the provision of a carriage upon which standardpaint spray guns may be mounted without alteration.

A further objectis the provision of means by which the spraying actionof the gun may be stopped automatically at predetermined points.

A further object is the provision of means for regulating the sprayingaction of the guns. i

' These and other objects are'attained bythe novel combination andarrangement of parts hereinafter described and shown 1n the accompanyingdrawings, constituting a ma- 1 terial part of this disclosure and inwhich:

Fig. 1 represents a plan view of the apparatus.

Fig. 2 represents a front elevational View of the apparatus.

Fig. 3 represents a partial rear elevational view. 1

Fig. 4 represents a perspective view of a sliding carriage having paintspraying guns mounted thereon.

Pg. 5 represents a sectional'view taken on line 5-5 of Fig. 4.

Referring to the drawings,'in Fig. 2, the apparatus is shown to includesupporting frames 6 and 7, upon which are mounted plates 8, the lattersupporting the shafts 9 and 10, and a track 11, upon which the triggersof the spray guns travel. a

The spray guns, of which there may be any desired number, are mounted ona carriage comprising the plate 12, to which is fixed the pair of upperbearings 13 for the shaft 9, and the lower bearings 14 for the shaft 10.

' Fixed to the plate 12 between the bearings 13 and 14, are angles 15and 17, which cooperate with the plates 16 and 18, to clamp the sprayguns 19 and 20 to the carriage.

The trigger 21 of the spray gun is provided.

at its extremity with spaced ears between which is rotatably mounted aroller 22, the latter travelling on the track 11. The trigger is pressedupwardly by contact with the track 11 to cause the gun to spray; andwhen the carriage reaches'either end of the track 11, the trigger fallsinto the cut-away portion 23 of the track, and the spraying action ofthe gun is stopped.

Compressed air and paint hoses 24 and 25 are led to the spray guns froma supply tank 26, and are supported above the carriage by a brace 26extending from the frame 7 Since it is desirable that the sprayingaction of the guns: when mounted on the carriage be regulated, the track11 is adjustably supported by the plates 8. Integral with plates 8 arelugs 27 and 28, upon which are mounted a screw 29, the latter passingthrough an aperture in the track 11.

A wing nut 30 is mounted on the screw 29 and bears against a coiledspring 31, which in turn bears against the track 11,. the latter restingupon a wing nut 32, also mounted on the screw 29. By means of thisarrangement the track 11 may beraiscd or lowered in order to regulatethe pressure of the track on the trigger 21, and. thus regulate thespraying action of the spray gun.

The spray guns are of a standard manually operable type in whichpressure upon the trigger is necessary to cause the spraying action.When used in connection with the upparatus herein disclosed, the usualtriggers of the guns are replaced by roller carrying triggers such asshown at 21 in Fig. 4.

Pivotally connected with the lug on the rear face of the plate 12 is arod 33 which has its other end pivotally connected at 33 to a studfixture link of a chain 34, the latter passing over sprocket wheels 35and 86, said wheels being of equal diameter.

The sprocket wheel 36 is fixed to a shaft 37, which has alsofixedthereto a pulley 38 over which passes the belt 39, the latter alsopassing over a pulley 4O fixed to shaft 41 which has also fixed theretoa pulley 42. A belt 43 passes over the pulley 42 and also over a pulley44 fixed to the shaft of an electric mo-- tor 45.

In operation one or more spray guns are clamped to the carriage as shownin Figure 4 and the electric motor is started. Rotation of the sprocketwheels 36 and 35 obviously I imparts a reciprocating motion to the rod33 and to the carriage. The triggers 21 of the spray guns ride up on thetrack 11 and are maintained in a position to cause the gun to sprayuntil they reach the cutout portions 23 of the track, at which point thetriggers are allowed to assume a position to stop thespraying action ofa gun.- Should it be deslred to increase or decrease the spraying actionof v the gun the height of the track 11 is raised or lowered by means ofthe wing nuts 30 and 32 to increase or decrease the pressure of the railon the triggers 21.

From the above description it will be seen that this apparatus will havea uniform spraying action and the reciprocating motion oi the carriagewill cause the spray to assume an arcuate path and'strike the surfacebeing sprayed at an acute angle greatly simulating the manner in whichpaint is supplied by means of a hand brush.

Obviously any number of spray guns may be mounted upon the carriage andthe apparatus may be operated at any desired speed. The surface beingsprayed preferably would be mounted upon a conveyor moving at a uniformrate and with the apparatus herein presented the services of anattendant are not needed. p

The foregoing disclosure isto be regarded as descriptive andillustrative only, and not as restrictive or limitative of theinvention, of which obviously an embodiment may be constructed includingmany modifications without departing from the general scope hereinindicated and denoted in the appended claim.

Having thus described my invention, what I claim asnew and desire tosecure by Letters Patent, is:

In a paint spraying apparatus, a slidably mounted carriage, apaint spraygun mounted on the carriage, a track positioned adjacent the carriage, aroller attached to the trigger of the gun and bearingon the track tocause the gun to operate, said track having depressions at each end intowhich the roller falls to enable the trigger to discontinue theoperation of the gun, said track having an aperture at each end,threaded rods passing through the apertures, and nuts in threadedengagement with said rods, the track being supported in adjustedpositions by said nuts.

This specification signed this 1st day of July, 1929.

WILLARDC. BEACH.

